Editorial Style Guide
Contraction of "you all." Though plural, it is often used as a singular term in the South.
The punctuation is considered part of the name. Always include it, even when awkward:
One word when used as an adjective:
The yearlong project begins in September.
Use figures without commas. Use commas only with a month and day. Use s without an apostrophe to indicate spans of decades or centuries. Years are the exception to the rule in numerals that a figure is not used to start a sentence. See also dates.
Dec. 18, 1994
1964 was a turbulent year.
UTSA was founded in 1969 by the Texas Legislature.
Use only in direct quotations and in phrases that do not refer to a specific day. Use the day of the week or date in other cases.
Yesterday we were young.
Classes began Aug. 22.
Classes will begin Tuesday.
Plural form of youth.